KWG's mathematical research journal is Indagationes Mathematicae. It appears six times per year and contains original mathematical research papers of high quality. It regularly has "Special Issues" dedicated to important events in Dutch mathematics, such as "L.E.J. Brouwer fifty years later". The journal is published for KWG by Elsevier.
We recognize that in recent years a growing number of researchers have chosen to publish in Open Access. As a Hybrid OA journal, Indagationes Mathematicae is included in Elsevier’s transformative agreements, helping authors affiliated with member institutions of participating organizations to publish their research open access without having to pay an APC (i.e. at no charge to the author) while still relying on high-quality peer-review and experienced editorial support. The cost of publishing open access is covered under the terms of the agreement. Please follow this link for the current list of agreements and participating organizations. In particular authors affiliated at institutions in the Netherlands and in many European countries fall under these agreements.